Deselecting TreeView items during insert

I'm using a CTreeView ( actually a SECTreeView from Stingray ) and I am unable to deselect all of the tree items before inserting a new one. Stingray provides a DeselectAllItems() method that seems to have no effect. I've tried sending UpdateWindow and RedrawWindow messages, setting the focus to the view then trying to deselect, even invalidating the entire client area and redrawing, but nothing seems to work. Anyone know how you would perform a DeselectAll type operation on a standard TreeView? Maybe I can work around the Stingray stuff...


Thanks!

John